[RFC/PATCH 1/9] ref-filter: add %(refname:lalignX) option

[Karthik Nayak <karthik.188@gmail.com>]

Add support for %(refname:lalignX) where X is a number.
This will print a shortened refname aligned to the left
followed by spaces for a total length of X characters.
If X is less than the shortened refname size, the entire
shortened refname is printed.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 ref-filter.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/ref-filter.c b/ref-filter.c
index 00d06bf..299b048 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -695,7 +695,22 @@ static void populate_value(struct ref_array_item *ref)
 			int num_ours, num_theirs;
 
 			formatp++;
-			if (!strcmp(formatp, "short"))
+			if (starts_with(formatp, "lalign")) {
+				const char *valp;
+				int val;
+
+				skip_prefix(formatp, "lalign", &valp);
+				val = atoi(valp);
+				refname = shorten_unambiguous_ref(refname,
+								  warn_ambiguous_refs);
+				if (val > strlen(refname)) {
+					struct strbuf buf = STRBUF_INIT;
+					strbuf_addstr(&buf, refname);
+					strbuf_addchars(&buf, ' ', val - strlen(refname));
+					free((char *)refname);
+					refname = strbuf_detach(&buf, NULL);
+				}
+			} else if (!strcmp(formatp, "short"))
 				refname = shorten_unambiguous_ref(refname,
 						      warn_ambiguous_refs);
 			else if (!strcmp(formatp, "track") &&
-- 
2.4.4